CVE-2026-68387

HighCVSS 7.8

Published: 10/08/2026(UTC)Updated: 17/08/2026(UTC)Translated: 10/08/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.17%

7th percentile - higher than 7% of all known CVEs

Summary

In the Linux kernel, the CAN raw subsystem has a race condition when modifying bitfield flags in the raw_sock structure. Read-modify-write operations in raw_setsockopt() can be executed concurrently, leading to unpredictable behavior.

Risk Assessment

This could lead to incorrect CAN protocol operation, potentially causing communication errors or system crashes.

Recommendation

Apply a Linux kernel update containing the fix that adds proper locking for flag operations.

Original NVD description (English source)

In the Linux kernel, the following vulnerability has been resolved: can: raw: add locking for raw flags bitfield With commit 890e5198a6e5 ("can: raw: use bitfields to store flags in struct raw_sock") the formerly separate integer values have been integrated into a single bitfield. This led to a read-modify-write operation when changing a flag in raw_setsockopt() which now needs a locking to prevent concurrent access. Instead of adding a lock/unlock hell in each of the flag manipulations this patch introduces a wrapper for a new raw_setsockopt_locked() function analogue to the isotp_setsockopt[_locked]() approach in net/can/isotp.c [mkl: use Closes tag instead of Link]